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/*-
* ============LICENSE_START=======================================================
* ONAP : CCSDK
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights
* reserved.
* ================================================================================
* Modifications Copyright (C) 2018 IBM.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
package org.onap.ccsdk.sli.core.sli.provider;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import org.onap.ccsdk.sli.core.dblib.DbLibService;
import org.onap.ccsdk.sli.core.sli.ConfigurationException;
import org.onap.ccsdk.sli.core.sli.ExitNodeException;
import org.onap.ccsdk.sli.core.sli.MetricLogger;
import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
import org.onap.ccsdk.sli.core.sli.SvcLogicDblibStore;
import org.onap.ccsdk.sli.core.sli.SvcLogicException;
import org.onap.ccsdk.sli.core.sli.SvcLogicGraph;
import org.onap.ccsdk.sli.core.sli.SvcLogicNode;
import org.onap.ccsdk.sli.core.sli.SvcLogicStore;
import org.onap.ccsdk.sli.core.sli.SvcLogicStoreFactory;
import org.opendaylight.controller.md.sal.dom.api.DOMDataBroker;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.MDC;
public class SvcLogicServiceImpl implements SvcLogicService {
private static final Map<String, SvcLogicNodeExecutor> BUILTIN_NODES = new HashMap<String, SvcLogicNodeExecutor>() {
{
put("block", new BlockNodeExecutor());
put("call", new CallNodeExecutor());
put("configure", new ConfigureNodeExecutor());
put("delete", new DeleteNodeExecutor());
put("execute", new ExecuteNodeExecutor());
put("exists", new ExistsNodeExecutor());
put("for", new ForNodeExecutor());
put("get-resource", new GetResourceNodeExecutor());
put("is-available", new IsAvailableNodeExecutor());
put("notify", new NotifyNodeExecutor());
put("record", new RecordNodeExecutor());
put("release", new ReleaseNodeExecutor());
put("reserve", new ReserveNodeExecutor());
put("return", new ReturnNodeExecutor());
put("save", new SaveNodeExecutor());
put("set", new SetNodeExecutor());
put("switch", new SwitchNodeExecutor());
put("update", new UpdateNodeExecutor());
put("break", new BreakNodeExecutor());
put("while", new WhileNodeExecutor());
put("exit", new ExitNodeExecutor());
}
};
private static final Logger LOG = LoggerFactory.getLogger(SvcLogicServiceImpl.class);
protected HashMap<String, SvcLogicNodeExecutor> nodeExecutors = null;
protected BundleContext bctx = null;
protected Properties properties;
protected SvcLogicStore store;
private static final String CURRENT_GRAPH="currentGraph";
public SvcLogicServiceImpl(SvcLogicPropertiesProvider resourceProvider) throws SvcLogicException {
properties = resourceProvider.getProperties();
getStore();
}
public SvcLogicServiceImpl(SvcLogicPropertiesProvider resourceProvider, DbLibService dbSvc)
throws SvcLogicException {
properties = resourceProvider.getProperties();
store = new SvcLogicDblibStore(dbSvc);
}
protected void registerExecutors() {
LOG.info("Entered register executors");
for (String nodeType : BUILTIN_NODES.keySet()) {
LOG.info("SLI - registering node executor for node type " + nodeType);
registerExecutor(nodeType, BUILTIN_NODES.get(nodeType));
}
LOG.info("Done registerExecutors");
}
public void registerExecutor(ServiceReference sr) {
String nodeName = (String) sr.getProperty("nodeType");
if (nodeName != null) {
SvcLogicNodeExecutor executor;
try {
executor = (SvcLogicNodeExecutor) bctx.getService(sr);
} catch (Exception e) {
LOG.error("Cannot get service executor for {}", nodeName, e);
return;
}
registerExecutor(nodeName, executor);
}
}
public void registerExecutor(String nodeName, SvcLogicNodeExecutor executor) {
if (nodeExecutors == null) {
nodeExecutors = new HashMap<>();
}
LOG.info("SLI - registering executor for node type {}", nodeName);
nodeExecutors.put(nodeName, executor);
}
public void unregisterExecutor(ServiceReference sr) {
String nodeName = (String) sr.getProperty("nodeType");
if (nodeName != null) {
unregisterExecutor(nodeName);
}
}
public void unregisterExecutor(String nodeName) {
LOG.info("SLI - unregistering executor for node type {}", nodeName);
nodeExecutors.remove(nodeName);
}
public SvcLogicContext execute(SvcLogicGraph graph, SvcLogicContext ctx) throws SvcLogicException {
if (nodeExecutors == null) {
registerExecutors();
}
// Set service name in MDC to reference current working directed graph
MDC.put(MetricLogger.SERVICE_NAME, graph.getModule() + ":" + graph.getRpc() + "/v" + graph.getVersion());
MDC.put(CURRENT_GRAPH, graph.toString());
SvcLogicNode curNode = graph.getRootNode();
LOG.info("About to execute graph {}", graph.toString());
try {
while (curNode != null) {
SvcLogicNode nextNode = executeNode(curNode, ctx);
curNode = nextNode;
}
} catch (ExitNodeException e) {
LOG.debug("SvcLogicServiceImpl caught ExitNodeException");
}
MDC.remove("nodeId");
MDC.remove(CURRENT_GRAPH);
return (ctx);
}
public SvcLogicNode executeNode(SvcLogicNode node, SvcLogicContext ctx) throws SvcLogicException {
if (node == null) {
return (null);
}
LOG.info("About to execute node # {} ({})", node.getNodeId(), node.getNodeType());
if (LOG.isDebugEnabled()) {
LOG.debug("Executing node " + node.getNodeId() + " of " + node.getGraph().getRpc());
}
SvcLogicNodeExecutor executor = nodeExecutors.get(node.getNodeType());
if (executor != null) {
LOG.debug("Executing node executor for node type {} - {}", node.getNodeType(),
executor.getClass().getName());
MDC.put("nodeId", node.getNodeId() + " (" + node.getNodeType() + ")");
return (executor.execute(this, node, ctx));
} else {
throw new SvcLogicException("Attempted to execute a node of type " + node.getNodeType() + ", but no executor was registered for this type");
}
}
@Override
public boolean hasGraph(String module, String rpc, String version, String mode) throws SvcLogicException {
return (store.hasGraph(module, rpc, version, mode));
}
@Override
public Properties execute(String module, String rpc, String version, String mode, Properties props)
throws SvcLogicException {
return (execute(module, rpc, version, mode, props, null));
}
@Override
public Properties execute(String module, String rpc, String version, String mode, Properties props,
DOMDataBroker domDataBroker) throws SvcLogicException {
LOG.info("Fetching service logic from data store");
SvcLogicGraph graph = store.fetch(module, rpc, version, mode);
if (graph == null) {
Properties retProps = new Properties();
retProps.setProperty("error-code", "401");
retProps.setProperty("error-message",
"No service logic found for [" + module + "," + rpc + "," + version + "," + mode + "]");
return (retProps);
}
SvcLogicContext ctx = new SvcLogicContext(props);
ctx.setAttribute(CURRENT_GRAPH, graph.toString());
ctx.setAttribute("X-ECOMP-RequestID", MDC.get("X-ECOMP-RequestID"));
ctx.setDomDataBroker(domDataBroker);
execute(graph, ctx);
return (ctx.toProperties());
}
public SvcLogicStore getStore() throws SvcLogicException {
// Create and initialize SvcLogicStore object - used to access
// saved service logic.
if (store != null) {
return store;
}
try {
store = SvcLogicStoreFactory.getSvcLogicStore(properties);
} catch (Exception e) {
throw new ConfigurationException("Could not get service logic store", e);
}
try {
store.init(properties);
} catch (SvcLogicException e) {
throw new ConfigurationException("Could not get service logic store", e);
}
return store;
}
}
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